Spring-hinge for electrical and other devices.



L. H. MOULTHROP.

SPRING HINGE FOR ELECTRICAL AND OTHER DEVICES.

APPLIOATIOI rum) JULY a1, 1908.

927.373. Patented July 5, 1909.

INVENTOR z/II A Tok/vEYs WITNESSES UNITED STATES PATENT OFFICE. LElllBERT H. MOULTHEOP, OF BRIDGEPORT, ESENECTICUT, ASSIGNOR TO THE PERKINS ELECTRIC SWITCH l\IANUFA("lURING COMPANY, OF BRIDGELORT, CONNECTICUT, A COR- PORATION OF CONNECTICUT.

I STRING-HINGE FOR ELECTRICAL AND OTHER DEVICES.

' No. 927,373, Specification of Letters Patent. Patented July 6, 1909.

Application filed July 31, 1908. Serial No. 446,344.

To all whom it may concern: a spiral spring P secured at one end in the Be it known that I, LEMIBERT H. llloUL- door B .(B), and at the other end to the face 45 'rnnor, a citizen of the United States, residplate A. This spiral spring hinge pin P y ing in the city of Bridgeport, in the county of V may be secured to the door and to thcplate 5 Fair-field, in the State of Connecticut, have I by solder s or staking s, or otherwise, but

invented acertain newand uselul ln'iproved the securing points should hesomerlistance Spring-Hinge for Electrical and other Deapart so as to leave a suitalile'lcn'gth of 50 vices, of which the following is a speciiicaspring between the securing poir'lts with free tion. play in a groove or'holein the two parts.

My improved spring hinge has been more As will he understood by reference to the particularly designed for application to'and drawings, a consiilerable length of each use in the doors or lids of electrical plug rcspring 1 has free play in its hole it in the 55 ceptacles, but as will be readily understood door, and a like free play in a part of the from the description which follows, the in. open groove p of the face plate. The coils vention is applicable toNarioils-other deof the springs are so arranged as to tend to vices. keep the doors in their closed positions.

in the accompanying drawings Figure l ll desired the spring hinge may have a 60 is a face view of the underside of the face straight center pin p within its coils, as plate of an electrical plug reccptzwlc or cut shown in llig. 4, for strengthening purposes, out. Fig. 2 is a perspective vicw'ol the unbut the spiral spring soldered or otherwise derside of one of the hinged doors hel'ore it secured to its opposite ends to the two parts is' put into the face plate; Fig. 3 is a sectional will remain essentially the hinge pin. 65 View on the line 3-3, Fig. 1; Fig. 4 is a view 1 clann as my 1nvent10n-'- of a modification. 1. The combination of a llXGd plate and a The receptacle face plate A illustrated in hinged door closing an opening therein and the drawings is one provided with two doors having a hinge pin consisting of a spiral B, B hinged at their outer ends and meeting spring secured at its opposite ends to the 70 together at the center but with semicircular door and plate respectively" notches at their 'nnwting edges to form a 2. The combination oftlielace plate of an central opening to receive the rounded head electrical plug rece taele provided with an of the plug when it is in the receptacle. As opening therein wit 1 a door closing the opena part of the hinging means l'rnake at least ing in said plate and provided with a. hinge 7 5 one (and by preference only one) of the/hinge consisting on one side of a plain pin and on p pins of a spiral spring. In the specific conthe other side of a. spiral spring, secured at struction illustrated, one ol the hinging pins one end to the door and at the other to the on one side of each lid is a plain pin 1, which plate. v is secured in a groovep, in the back of the In testimony whereof l. have signed my 80 face plate and projects freely into an opening name to this specification, in the presence forming a hearing in the door. The pin 1. of two subscribing witnesses.

may he secured. to the plate A by solder s LEMBERT ll l\l()lllfl.lllt()l.

or by staking down the metal of the plate Witnesses: at the edges of the groove p as at s, Fig. 1. G. W. Goonnrpcn,

The other hinge pin for each lid consists of Y H. W. Gornsnonoucn. 

